ES2566958T3

ES2566958T3 - Watertight tube

Info

Publication number: ES2566958T3
Application number: ES11190081.7T
Authority: ES
Inventors: Manfred Klein; Tom Hager
Original assignee: Hilti AG
Current assignee: Hilti AG
Priority date: 2010-12-21
Filing date: 2011-11-22
Publication date: 2016-04-18
Anticipated expiration: 2031-11-22
Also published as: EP2469141B1; CA2760160A1; EP2469141A3; PL2469141T3; EP2469141A2; US9383043B2; CA2760160C; DE102010063652A1; US20120217424A1

Abstract

Tubo estanco (14) para un pasamuros para líneas de conducción, en donde dicho tubo estanco puede sujetarse con sus extremos relativamente plegados en torno a su eje longitudinal, con varios elementos de sellado separados (30), dispuestos en el interior, aproximadamente en el centro del tubo estanco, caracterizado porque su longitud se extiende esencialmente a lo largo del perímetro del tubo estanco.Watertight tube (14) for a cable gland for conduction lines, wherein said watertight tube can be held with its relatively folded ends around its longitudinal axis, with several separate sealing elements (30), arranged inside, approximately in the center of the watertight tube, characterized in that its length extends essentially along the perimeter of the watertight tube.

Description

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DESCRIPCIONDESCRIPTION

Tubo estancoWatertight tube

La presente invencion hace referenda a un tubo estanco para un pasamuros para ilneas de conduction, en el que el tubo estanco puede sujetarse por sus extremos plegados uno con respecto al otro en torno a su eje longitudinal.The present invention refers to a watertight tube for a conduit for conduction lines, in which the watertight tube can be held by its folded ends relative to each other around its longitudinal axis.

Un tubo estanco tal se conoce gracias a la DE 10 2006 035 475 A1. El pasamuros para llneas de conduccion se utiliza para pasar llneas de conduccion tales como tuberlas, cables o canalizaciones para cables a traves de otros elementos, por ejemplo, a traves de techos o paredes. El pasamuros para llneas de conduccion ademas deberla permitir, por un lado, que se puedan cambiar o anadir llneas posteriormente, y por otro deberla lograrse un sellado, en particular frente a gases de combustion. Para este proposito se utiliza el tubo estanco, a traves del cual las llneas se llevan de un lado a otro de la pared o techo. Tras el montaje de las llneas, ambos extremos del tubo estanco se pliegan uno con respecto al otro, por lo que la pared del tubo estanco tira/se arrastra en espiral hacia el interior y se sujeta firmemente contra las llneas. De esta manera se consigue un buen sellado.Such a sealed tube is known from DE 10 2006 035 475 A1. Conduit lines for conduction lines are used to pass conduction lines such as pipes, cables or cable ducts through other elements, for example, through ceilings or walls. The conduits for conduction lines should also allow, on the one hand, that they can be changed or added lines later, and on the other one a seal should be achieved, in particular against combustion gases. For this purpose the watertight tube is used, through which the lines are carried from one side of the wall to the other. After the assembly of the lines, both ends of the watertight tube are folded with respect to each other, whereby the wall of the watertight tube pulls / spirals inwards and is held firmly against the lines. In this way a good seal is achieved.

Por el documento mencionado anteriormente, es conocida la aplicacion en la cara interna del tubo estanco de una fina capa de material de espuma o goma delgada, ya sea como recubrimiento continuo o en forma de tiras longitudinales o nervaduras. Aunque este material de sellado mejora el efecto de sellado en la region de contacto con las llneas, se ha observado que al mismo tiempo la propia rotation, en particular, dificulta la consecuente formation de rugosidades.From the document mentioned above, the application on the inner face of the watertight tube of a thin layer of foam or thin rubber material is known, either as a continuous coating or in the form of longitudinal strips or ribs. Although this sealing material improves the sealing effect in the region of contact with the lines, it has been observed that at the same time the rotation itself, in particular, hinders the consequent formation of roughness.

El objeto de la invencion consiste en el desarrollo de un tubo estanco del tipo mencionado inicialmente de tal manera que se obtenga un efecto de sellado mejorado.The object of the invention is the development of a sealed tube of the type mentioned initially in such a way that an improved sealing effect is obtained.

Para lograr este objeto, conforme a la invencion se preve que en el interior del tubo estanco se dispongan varios elementos de sellado independientes. Los elementos de sellado estan aproximadamente en el centro del tubo estanco, es decir, en la zona a mitad de su longitud, y su longitud se extiende sustancialmente a lo largo del perlmetro, es decir, transversalmente al eje longitudinal del tubo estanco. Los elementos de sellado son discontinuos, y unicamente en estado cerrado, es decir, despues de realizarse el plegamiento del tubo estanco, se obtiene como resultado la conformation de anillo. Ademas, los elementos de sellado actuan a modo de una barrera anular que es presionada por el tubo estanco en direction radial hacia el interior contra las llneas. De este modo, se origina un sellado particularmente bueno.In order to achieve this object, according to the invention it is provided that several independent sealing elements are arranged inside the sealed tube. The sealing elements are approximately in the center of the watertight tube, that is, in the area half its length, and its length extends substantially along the perimeter, that is, transversely to the longitudinal axis of the watertight tube. The sealing elements are discontinuous, and only in a closed state, that is, after the sealing of the sealed tube, the ring conformation is obtained. In addition, the sealing elements act as an annular barrier that is pressed by the sealed tube radially inwardly against the lines. In this way, a particularly good seal originates.

Los elementos de sellado se disponen a lo largo de una llnea que describe el perlmetro del tubo estanco, con lo que los elementos de sellado no tienen que estar necesariamente dispuestos con igual orientation sobre la llnea. Tanto una distribucion oblicua y/o irregular, al igual que una distribution lineal cumplen con el objeto de lograr un efecto de sellado mejorado.The sealing elements are arranged along a line describing the perimeter of the sealed tube, whereby the sealing elements do not necessarily have to be arranged with the same orientation on the line. Both an oblique and / or irregular distribution, as well as a linear distribution, meet the objective of achieving an improved sealing effect.

La invencion se basa en el sorprendente hallazgo de que es posible obtener un mejor sellado, en general, mediante diversos elementos de sellado cortos, separados a una distancia determinada, sin perjudicar de este modo la capacidad de deformation de la pared del tubo estanco.The invention is based on the surprising finding that it is possible to obtain a better seal, in general, by means of various short sealing elements, separated at a certain distance, without thereby impairing the deformability of the wall of the watertight tube.

Preferiblemente, se preve que los elementos de sellado esten separados entre si en la direccion perimetral del tubo estanco. Esta caracterlstica permite que la pared del tubo estanco este libre para contraer en espiral los elementos de sellado en su direccion perimetral.Preferably, it is provided that the sealing elements are separated from each other in the perimeter direction of the sealed tube. This feature allows the watertight tube wall to be free to spirally seal the sealing elements in their perimeter direction.

Preferentemente, se preve que la longitud total de los elementos de sellado sea menor que el perlmetro del tubo estanco, en donde la longitud total se calcula a partir de la suma de las longitudes de los elementos, que se encuentran en un plano de corte que se define por una section a traves del conducto perpendicular a su eje longitudinal. Por consiguiente, en una distribucion oblicua y/o irregular de los elementos de sellado la suma real de los elementos individuales puede ser mayor que el perlmetro del tubo estanco. Se prefiere especialmente que la longitud total de los elementos de sellado ascienda a aproximadamente un 50 % del perlmetro del tubo estanco.Preferably, it is expected that the total length of the sealing elements is less than the perimeter of the sealed tube, where the total length is calculated from the sum of the lengths of the elements, which are in a cutting plane that It is defined by a section through the duct perpendicular to its longitudinal axis. Therefore, in an oblique and / or irregular distribution of the sealing elements the actual sum of the individual elements may be greater than the perimeter of the sealed tube. It is especially preferred that the total length of the sealing elements amounts to approximately 50% of the perimeter of the sealed tube.

Contrariamente a la opinion predominante, segun la cual deberlan utilizarse el mayor numero posible de elementos de sellado para asegurar una gran area de contacto con las llneas, se ha observado que los elementos de sellado muy pequenos segun la invencion ya son capaces de lograr el sellado deseado contra el paso de medios gaseosos. La ventaja en particular de los elementos de sellado segun la invencion es que tienen un efecto mlnimo en lo que a la deformacion de la pared se refiere, de modo que puedan aplicarse libremente cerca de las propias llneas.Contrary to the prevailing opinion, according to which the greatest possible number of sealing elements should be used to ensure a large area of contact with the lines, it has been observed that the very small sealing elements according to the invention are already capable of achieving sealing. desired against the passage of gaseous media. The particular advantage of the sealing elements according to the invention is that they have a minimal effect as far as the deformation of the wall is concerned, so that they can be freely applied near the lines themselves.

Segun un modo de realization de la invencion se proporcionan seis elementos de sellado que se disponen a lo largo del perlmetro del tubo estanco con igual separation entre si. Preferiblemente, la longitud de un elemento de sellado individual corresponde a aproximadamente un 8 % del perlmetro del tubo estanco. Esta configuration se basa en elAccording to one embodiment of the invention, six sealing elements are provided which are arranged along the perimeter of the sealed tube with equal separation from each other. Preferably, the length of an individual sealing element corresponds to approximately 8% of the perimeter of the sealed tube. This configuration is based on the

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conocimiento de que incluso con comparativamente pocos elementos de sellado puede obtenerse un efecto de sellado muy bueno.knowledge that even with comparatively few sealing elements a very good sealing effect can be obtained.

Preferiblemente, se preve que los elementos de sellado tengan una seccion transversal triangular. Esta forma de seccion transversal facilita que los elementos de sellado se adapten a las lineas de conduccion situadas en el interior del tubo estanco y estas quedan fuertemente ajustadas.Preferably, it is provided that the sealing elements have a triangular cross section. This form of cross section makes it easier for the sealing elements to adapt to the conduction lines located inside the watertight tube and these are tightly adjusted.

Preferiblemente, se preve que los elementos de sellado presenten ranuras transversales respecto a su direccion longitudinal. Tambien esta caracteristica refuerza el contacto ajustado entre los elementos de sellado en las lineas, ya que dichos elementos de sellado pueden ceder de manera especialmente flexible debido a las ranuras.Preferably, it is provided that the sealing elements have transverse grooves with respect to their longitudinal direction. This feature also reinforces the tight contact between the sealing elements in the lines, since said sealing elements can yield in a particularly flexible manner due to the grooves.

La altura de los elementos de sellado se debe seleccionar para que estos, por un lado, penetren lo mas profundamente posible en los espacios intermedios del cable externo del haz de cables, pero, por otro lado, para que no obstaculice que se pueda ocupar el tubo estanco con cables en la abertura del conducto. Se ha observado que una altura de entre 5 mm y 20 mm resulta ventajosa. De forma especialmente preferente, la altura de los elementos de sellado es de 11 mm. La altura de los elementos de sellado es independiente del perimetro del tubo estanco y de la longitud de los elementos de sellado.The height of the sealing elements must be selected so that they, on the one hand, penetrate as deeply as possible into the intermediate spaces of the external cable of the cable harness, but, on the other hand, so that it does not hinder the occupation of the watertight tube with wires in the conduit opening. It has been observed that a height between 5 mm and 20 mm is advantageous. Especially preferably, the height of the sealing elements is 11 mm. The height of the sealing elements is independent of the perimeter of the sealed tube and the length of the sealing elements.

El material de los elementos de sellado debe ser de tal manera que sea lo suficientemente elastico y se adhiera tan completamente como sea posible al haz de cables para sellar sustancialmente los huecos resultantes entre los cables exteriores del haz de cables. Por otra parte, se tiene que garantizar que el material sea en si estanco, es decir que en caso de incendio no se propague nada de humo a traves del material. En consecuencia, el material deberia ser estanco al aire. Los materiales adecuados son, evidentemente, espumas de celula cerrada y de celula mixta, en donde los materiales de celulas abiertas tienen preferiblemente una superficie sustancialmente cerrada. A modo de ejemplo se pueden mencionar las espumas integrales, siliconas, elastomeros tales como los cauchos naturales y sinteticos, espumas de poliuretano (PUR), caucho de nitrilo (NBR), caucho de estireno-butadieno (SBR) y caucho de etileno-propileno-dieno (EPDM) y similares.The material of the sealing elements should be such that it is sufficiently elastic and adheres as completely as possible to the cable harness to substantially seal the resulting gaps between the outer cables of the cable harness. On the other hand, it must be ensured that the material is in itself airtight, that is, in case of fire, no smoke propagates through the material. Consequently, the material should be air tight. Suitable materials are, of course, closed cell and mixed cell foams, wherein the open cell materials preferably have a substantially closed surface. As an example, integral foams, silicones, elastomers such as natural and synthetic rubbers, polyurethane foams (PUR), nitrile rubber (NBR), styrene-butadiene rubber (SBR) and ethylene-propylene rubber can be mentioned. -diene (EPDM) and the like.

Se ha observado que el caucho de etileno-propileno-dieno (EPDM) es especialmente apropiado para su utilizacion en el interior del tubo estanco, y muy especialmente apropiado el caucho de etileno-propileno-dieno de celula cerrada (EPDM).It has been observed that ethylene-propylene-diene rubber (EPDM) is especially suitable for use inside the sealed tube, and closed cell ethylene-propylene-diene rubber (EPDM) is especially suitable.

Los elementos de sellado pueden estar pegados o cosidos al tubo estanco. Esta caracteristica permite instalarlos en el mismo con bajo coste. De forma alternativa, el elemento de sellado se puede aplicar directamente en cierre de forma al tubo estanco, el cual actua en este caso como soporte, mediante pulverizacion directamente sobre el material del tubo estanco.The sealing elements may be glued or sewn to the sealed tube. This feature allows them to be installed at a low cost. Alternatively, the sealing element can be applied directly in form closure to the sealed tube, which in this case acts as a support, by spraying directly on the material of the sealed tube.

La invencion se describe a continuacion de acuerdo a un modo de realizacion preferente que se ilustra en los dibujos adjuntos. Los dibujos muestran:The invention is described below according to a preferred embodiment illustrated in the accompanying drawings. The drawings show:

- La figura 1 muestra esquematicamente un pasamuros para lineas de conduccion con tubo estanco;- Figure 1 schematically shows a cable gland for conduction lines with a watertight tube;

- La figura 2 es una vista axial de un tubo estanco conforme a la invencion;- Figure 2 is an axial view of a sealed tube according to the invention;

- La figura 3 muestra esquematicamente una seccion a lo largo del plano III-III de la figura 2; y- Figure 3 schematically shows a section along the plane III-III of figure 2; Y

- La figura 4, en una escala ampliada, muestra el detalle IV de la figura 2.- Figure 4, on an enlarged scale, shows detail IV of figure 2.

En la Figura 1 se muestra un pasamuros para lineas de conduccion 10, segun se conoce a partir de la patente DE 10 2006 035 475 A1, ya indicada anteriormente. Incluye una camisa de un tubo de recubrimiento 11, que se muestra abierta en la presente representacion. En el interior del tubo de recubrimiento se dispone un tubo estanco 14 que consiste en un tejido de goma o material de pelicula flexible y/o elastico de paredes delgadas y estanco a los gases. En los extremos axiales del tubo estanco 14 se disponen anillos de soporte 25, 26, con los que el tubo estanco se sujeta en el interior del tubo de recubrimiento 11, de forma que en el estado inicial este abierto y (salvo un ligero corte lateral) sea cilindrico. Ambos anillos de soporte 25, 26 se pueden plegar uno con respecto al otro en torno a un eje longitudinal L del pasamuros para lineas de conduccion, por lo que la pared del tubo estanco 14 se pliega en espiral y se contrae hacia el eje longitudinal L. De este modo, el tubo estanco se sujeta estrechamente contra una linea que pasa a traves del mismo o contra un paquete de lineas guiadas a traves del mismo. Esto se conoce en principio gracias al estado actual de la tecnica.Figure 1 shows a cable gland for conduction lines 10, as is known from DE 10 2006 035 475 A1, already indicated above. It includes a jacket of a coating tube 11, which is shown open in the present representation. Inside the cover tube there is a sealed tube 14 consisting of a rubber fabric or flexible and / or elastic film material with thin walls and gas tight. Support rings 25, 26 are arranged at the axial ends of the sealed tube 14, with which the sealed tube is held inside the cover tube 11, so that in the initial state it is open and (except for a slight lateral cut ) be cylindrical. Both support rings 25, 26 can be folded with respect to each other around a longitudinal axis L of the passage for conduction lines, whereby the wall of the sealed tube 14 is spirally folded and contracted towards the longitudinal axis L In this way, the watertight tube is held tightly against a line that passes through it or against a package of guided lines through it. This is known in principle thanks to the current state of the art.

De acuerdo con la invencion, esta previsto que en el interior del tubo estanco se prevean varios elementos de sellado 30, disenados por separado y dispuestos a lo largo del perimetro a una distancia determinada unos de otros sobre la cara interna de la pared del tubo estanco. En este caso se emplean seis elementos de sellado, con una seccion transversal triangular y con una de sus caras externas adherida a la pared del tubo estanco (vease la capaAccording to the invention, it is provided that several sealing elements 30 are provided inside the sealed tube, designed separately and arranged along the perimeter at a certain distance from each other on the inner face of the wall of the sealed tube . In this case, six sealing elements are used, with a triangular cross-section and with one of its outer faces adhered to the wall of the watertight tube (see the layer

de adhesivo 32 en las Figuras 3 y 4). De forma alternativa, los elementos de sellado 30 tambien se pueden coser a la pared del tubo estanco 14.of adhesive 32 in Figures 3 and 4). Alternatively, the sealing elements 30 can also be sewn to the wall of the sealed tube 14.

Los elementos de sellado 30 se disponen ademas de tal forma que se extiendan transversalmente al eje longitudinal del tubo estanco. Expresado de otra manera: los elementos de sellado 30 se extienden como un anillo estrecho 5 (discontinuo) en su direccion perimetral a lo largo de la cara interna del tubo estanco (vease tambien la Figura 1). Como Material para los elementos de sellado 30 es especialmente ventajoso el EPDM. Cada uno de los elementos de sellado 30 se corta en forma de peine (veanse las ranuras 34 particularmente en la Figura 4), de modo que se formen varios segmentos estancos anexos pero independientes en un elemento de sellado. Los segmentos del elemento de sellado tienen un ancho en un rango de 1 a 3 mm.The sealing elements 30 are further arranged so that they extend transversely to the longitudinal axis of the sealed tube. In other words: the sealing elements 30 extend like a narrow ring (discontinuous) 5 in its perimetral direction along the inner face of the watertight tube (see also Figure 1). The EPDM is especially advantageous as Material for the sealing elements 30. Each of the sealing elements 30 is cut in the form of a comb (see slots 34 particularly in Figure 4), so that several separate but independent sealed segments are formed in a sealing element. The segments of the sealing element have a width in a range of 1 to 3 mm.

10 La longitud de los elementos de sellado 30 en direccion perimetral se mide de forma que, en el ejemplo de ejecucion mostrado con seis elementos de sellado separados, origine la longitud total de los elementos de sellado, que corresponde a aproximadamente la mitad del perlmetro del tubo estanco 14. En el conducto con un diametro de aproximadamente 105 mm y una longitud de aproximadamente 220 mm, cada uno de los elementos de sellado tiene una longitud de 25 mm, un ancho de 12 mm (correspondiente a aproximadamente el 5 % de la longitud del tubo) y 15 una altura de 11 mm.10 The length of the sealing elements 30 in the perimeter direction is measured such that, in the exemplary embodiment shown with six separate sealing elements, the total length of the sealing elements, corresponding to approximately half of the perimeter of the airtight tube 14. In the conduit with a diameter of approximately 105 mm and a length of approximately 220 mm, each of the sealing elements has a length of 25 mm, a width of 12 mm (corresponding to approximately 5% of the tube length) and a height of 11 mm.

Claims

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1. Watertight tube (14) for a passage for conduction lines, where said watertight tube can be fastened with its relatively folded ends around its longitudinal axis, with several separate sealing elements (30), arranged inside approximately in the center of the sealed tube, characterized in that its length extends essentially along the perimeter of the sealed tube.

2. A sealed tube according to claim 1, characterized in that the sealing elements (30) are separated from each other in the perimeter direction of the sealed tube (14).

3. Tight tube according to claim 1 or 2, characterized in that the total length of the sealing elements (30) is less than the perimeter of the sealed tube, where the total length is calculated from the sum of the lengths of the elements , which are in a cutting plane that is defined by a section through the duct perpendicular to its longitudinal axis.

4. A sealed tube according to claim 3, characterized in that the total length of the sealing elements (30) corresponds to approximately 50% of the perimeter of the sealed tube (14).

5. A sealed tube according to one of the preceding claims, characterized in that six sealing elements (30) are arranged with the same separation from each other along the perimeter of the sealed tube (14), where the length of the individual sealing element (30) corresponds to approximately 8% of the perimeter of the watertight tube (14).

6. A sealed tube according to one of the preceding claims, characterized in that the sealing elements (30) have a triangular cross section.

7. A sealed tube according to one of the preceding claims, characterized in that the sealing elements (30) have transverse grooves with respect to their longitudinal direction.

8. A sealed tube according to one of the preceding claims, characterized in that the sealing elements (30) have a height between 5 mm and 20 mm.

9. A sealed tube according to one of the preceding claims, characterized in that the sealing elements (30) are made of a material selected from elastomers, natural and synthetic rubbers, silicones.

10. Tight tube according to claim 9, characterized in that the sealing elements (30) are made of closed cell ethylene-propylene-diene rubber.

11. A sealed tube according to one of the preceding claims, characterized in that the sealing elements (30) are glued or sewn to the sealed tube (14).